Particles in parenteral drug products are a serious concern; they can cause issues such as product recalls, or worse, immunogenic responses. Sources of particles are varied; they can be from aggregates of biologic API&rsquo;s, excipient contaminants, components, or silicone oil used to promote syringe function. With emphasis on safe and efficient delivery of drug products, West is focused on strategies to both measure particles, and mitigate their presence.